kernel/locking/lockdep.c:727:21: error: 'CONFIG_RUST' undeclared; did you mean 'CONFIG_USB'?

kernel/locking/lockdep.c:727:21: error: 'CONFIG_RUST' undeclared; did you mean 'CONFIG_USB'?

[kernel test robot]

tree:   https://github.com/intel-lab-lkp/linux/commits/Gary-Guo/rust-sync-introduce-a-way-to-create-lock-class-from-caller/20260703-220743
head:   090a8fd3c5e7c50a1ebd6fc2ef51e1dbaaa81378
commit: 090a8fd3c5e7c50a1ebd6fc2ef51e1dbaaa81378 lockdep: delegate Rust lock class printing to Rust code
date:   12 hours ago
config: x86_64-rhel-9.4-kselftests (https://download.01.org/0day-ci/archive/20260704/202607040403.yLeH4bDF-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260704/202607040403.yLeH4bDF-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202607040403.yLeH4bDF-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/locking/lockdep.c: In function '__print_lock_name':
>> kernel/locking/lockdep.c:727:21: error: 'CONFIG_RUST' undeclared (first use in this function); did you mean 'CONFIG_USB'?
     727 |                 if (CONFIG_RUST && class->name == lockdep_rust_name)
         |                     ^~~~~~~~~~~
         |                     CONFIG_USB
   kernel/locking/lockdep.c:727:21: note: each undeclared identifier is reported only once for each function it appears in


vim +727 kernel/locking/lockdep.c

   716	
   717	static void __print_lock_name(struct held_lock *hlock, struct lock_class *class)
   718	{
   719		char str[KSYM_NAME_LEN];
   720		const char *name;
   721	
   722		name = class->name;
   723		if (!name) {
   724			name = __get_key_name(class->key, str);
   725			printk(KERN_CONT "%s", name);
   726		} else {
 > 727			if (CONFIG_RUST && class->name == lockdep_rust_name)
   728				lockdep_print_rust_name((struct lock_class_key *)(
   729					class->key - class->subclass
   730				));
   731			else
   732				printk(KERN_CONT "%s", name);
   733			if (class->name_version > 1)
   734				printk(KERN_CONT "#%d", class->name_version);
   735			if (class->subclass)
   736				printk(KERN_CONT "/%d", class->subclass);
   737			if (hlock && class->print_fn)
   738				class->print_fn(hlock->instance);
   739		}
   740	}
   741	

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